No permission to copy files (live CD)

Question

I'm trying to dual boot Windows 8.1 and Ubuntu and a solution I have come accross requires me to do some copying and pasting to get grub to appear. (My problem is that grub never shows up).

Here are the instructions from the AskUbuntu question:

---

mounting /dev/sda3 from live-session

copy EFI/ubuntu/grubx64.efi to EFI/Boot/
rename EFI/Boot/bootx64.efi to bootx64.efi.old
rename EFI/Boot/grubx64.efi to bootx64.efi

now it booted directly into grub2, but without win7 entry

after loading ubuntu I edited

/etc/grub.d/40_custom

adding

menuentry "Windows 7" {
    set root='(hd0,gpt3)'
    chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}

and after

sudo update-grub

---

My problem:

When I try to copy those files using the Files app, I'm given a permission error. I have no idea how to proceed. Please please help me out. Thank you.

Solution

That is because you need to launch the file browser with admin privileges, and to do that, open a terminal window (ctrl-alt-t), type sudo -i to become root user, then type nautilus to launch the file browser.

summary:

ctrl-alt-t
sudo -i
nautilus

Comments

[john]

Thanks for your answer. Does this work in Ubuntu 14.10?

[john]

It worked for me. Just that I saw similar questions on this site and none of them worked for 14.10. This one works though. It didn't solve my problem though but thanks!